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Copper grease between alloy and hub?


stevie_b

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When I tried to remove the roadwheels from my Ford Cmax recently, they were stuck on. I had to drive around the block with the wheel nuts loose in order to free the wheels.

 

That did the trick, but when I put the wheels back on, I used a bit of copper grease between the inboard alloy wheel surface and the hub surface to prevent it happening again.

 

See post #5 in this thread: http://www.mkivsupra.net/vbb/showthread.php?332876-Wheel-spacers-how-safe&p=4136621&viewfull=1#post4136621

It makes me think the copper grease was a bad idea. What do you think? And if it's a bad idea, what's the best way of preventing the wheels from seizing onto the hubs in future? Some kind of non-metallic gasket might do it.

Edited by stevie_b (see edit history)
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Get the grease off and prob live with the situation, better they're 'stuck' on than not, the grease just puts stress on the bolts.

 

What a complete load of rubbish.

As long as they are stock wheels or have a correctly sized hub centric ring a small amount of copper grease on the hub surface to stop it rusting will make zero difference to the stress on a bolt.

 

What does make a difference is copper grease on the lugs and bolts themselves. That can effect the torque but IMO is only required if using alloy nuts on a steal stud.

Edited by T2 MSW (see edit history)
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What a complete load of rubbish.

As long as they are stock wheels or have a correctly sized hub centric ring a small amount of copper grease on the hub surface to stop it rusting will make zero difference to the stress on a bolt.

 

So you dont want maximum 'friction' between your wheels and hubs then?

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A small amount of copper grease on the face of the hub centric ring (not all over the face of the hub) will make very little difference to friction between the back of the wheel and the face of the hub.

 

What will make a big difference is greasing the bolts as you will not get the same required level of torque and therefore force of the wheel against the hub. This is the reason the likes of porche and bentley quote dry and wet torque figures.

Edited by T2 MSW (see edit history)
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Based on the thread that I linked to in the 1st post, I can see Annabella's point. But it seems many people have been using it without issues, so I won't sweat it. I didn't trowel it on, just a thin smear.

 

Thats all you need bud, just to help stop corrosion.

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I had to look at the date to check that this wasn't April 1st again.

 

The use of copper grease will have zero issues on the hub or the bolts for that matter. It is used as an anti rust only and is heat resistant. I used to use it on industrial valves years ago so when they were refurbed we could actually open the buggers up in 10 years time.

 

CW's post in the other thread is referring to wheels that are not supported by the hub to centralise the wheels and therefore the use if any substance that is "slippy", will not help matters. In that scenario, the bolts are taking the load of the wheel and that is dangerous. If the wheel is correctly located on the central hub ring and the bolts are torqued to the correct setting, there is nothing that is going to loosen them other than a wheel brace.

 

I hope this clarifies the issue.

 

Good reading though.

 

H.

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Looks like I killed a thread again.

 

Ill pick on you now :)

 

Your statement about nothing undoing a wheel nut except a wheel brace is incorrect. Its one of the key things to check at intervals through the day when doing track days as the stresses and heat cycles does loosen the nuts. Ive seen it happen at track days and whilst I've never had it personally on my car, Phils is a bugger for it.

 

Religiously check nuts are in excess of 90ft/lbs at least 3 times on a track day :D Bignum will back me up on that one too

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Ok, I will agree that after being initially tightened they should be checked shortly after or after massive changes in heat etc. The grease is not going to make any difference though is it?

 

I appreciate that tension on bolts can "relax". I think there has been a massive misunderstanding regarding CW's post.

 

H.

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Agreed with that bit :)

 

just letting you know it will be on your track check list you have to check when we do the first one :) Theres no such thing as just turn up and rag your car round all day, well not if you want your car to last theres not :D

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Agreed with that bit :)

 

just letting you know it will be on your track check list you have to check when we do the first one :) Theres no such thing as just turn up and rag your car round all day, well not if you want your car to last theres not :D

 

Ok, you can check shit like that. I'll get the brews in..!!

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